Vetus vs Mothership (electric motor test)
Vetus vs Mothership (electric motor test)
Of the 2 Mothership Marine prefer the PMAC motor. Here’s why.
Permanent Magnet AC Motors (PMACs) stand out as superior choices for marine propulsion due to their exceptional reliability and efficiency.
The motors consists of two key components: the rotor and the stator. The rotor, connected to the propeller, features permanent magnets typically made of rare-earth metals. These magnets react to the magnetic field generated by the stationary stator, which surrounds the rotor. The stator contains electromagnets powered by an AC current.
The AC current is produced by the motor controller which converts DC current (from the boat’s batteries) to 3 phase AC current and when introduced into the electromagnets which causes the rotor to rotate.
PMACs offer several advantages for marine applications:
- Efficiency: PMACs excel in efficiency as the rotor and stator interact solely through a magnetic field, eliminating friction and reducing wasted energy. The AC signal further enhances efficiency, ensuring smooth transitions between electromagnetic coils for a continuous, efficient rotation.
- Low Wear and Tear: Labeled as “zero maintenance” motors.
- Low Noise: PMACs operate quietly by avoiding excess friction, making them one of the quietest motor types.
- Power Density: PMAC produce more power compared to other motor types of a similar size.
In short, they are quiet, efficient, lightweight and don’t need maintaining.
Downside – PMAC motors are more expensive.